Thermal Conduction and Insulation Modification in Asphalt-Based Composites

J Mater Sci Technol ›› 2012, Vol. 28 ›› Issue (3): 285-288.

• Regular Papers • Previous Articles

Thermal Conduction and Insulation Modification in Asphalt-Based Composites

Xiaofeng Zhou^1,2,3), Shengyue Wang¹⁾, Chao Zhou¹⁾

1) School of Transportation, Southeast University, Nanjing 210096, China
2) School of Energy and Environment, Southeast University, Nanjing 210096, China
3) Department of Fundamental Sciences, Yancheng Institute of Technology, Yancheng 224003, China

Received:2010-04-09 Revised:2012-01-24 Online:2012-03-31 Published:2012-03-31
Supported by:
the National Natural Science Foundation of China under grants Nos. 50906073 and 50973018

Abstract

Abstract: The relationship between thermal conductivity and properties of mixing particles is required for quantitative study of heat transfer processes in asphalt-based materials. In this paper, we measured the effective thermal conductivity of asphalt-based materials with thermal conduction (graphite) and insulation (cenosphere) powders modification. By taking account of the particle shape, volume fraction, the thermal conductivity of filling particles and base asphalt, we present a new differential effective medium formula to predict the thermal conductivity modification in asphalt-based composite. Our theoretical predications are in good agreement with the experiment data. The new model can be applied for predicting the thermal properties of asphalt-based mixture, which is available for most of thermal modification in two-phase composites.

Key words: Thermal conductivity, Asphalt-based composites, Graphite, Cenosphere, Differential effective medium formula

Xiaofeng Zhou, Shengyue Wang, Chao Zhou. Thermal Conduction and Insulation Modification in Asphalt-Based Composites[J]. J Mater Sci Technol, 2012, 28(3): 285-288.

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